<!DOCTYPE html>
<html>
<head>
    <title>111</title>
        <script src="../lib/jquery-1.11.2.min.js" type="text/javascript"></script>
</head>
<body>
<div class="box">
    <ul class="one">
        <li>111</li>
        <li>222</li>
        <li>333</li>
    </ul>
    <ul class="two">
        <li>444</li>
        <li>555</li>
    </ul>
</div>
<div class="box_two">
    <div>1</div>
    <div>2</div>
    <div>3</div>
    <div>4</div>
    <div>5</div>
</div>
</body>
<script type="text/javascript">
$(function(){
    $(".box li").on("click",function(){
        var $index = $(this).index();
        console.log($index);
        $(".box_two div").eq($index).css("color","red")
    })
})
</script>
</html>